Box sealing device, packing machine and computer-readable medium

ABSTRACT

The present application discloses a box sealing device, a packaging machine and a computer-readable medium. The box sealing device can be used for sealing a packaging box; the packaging box comprises a main plate and a main cover, and further has a pressing piece, and a bending piece connected to the pressing piece and bending towards the main plate to a preset angle. The box sealing device does not need a plurality of folding plates cooperating, and the structure is simple.

CROSS-REFERENCE TO RELATED APPLICATION

The present application is a continuation application of internationalapplication No. PCT/CN2020/076302, filed on Feb. 22, 2020, which claimsthe priority benefits of Chinese applications No. 201910132289.5, No.201920229715.2, No. 201910133927.5 and No. 201920234126.3 field on Feb.22, 2019, the contents of the above identified applications are herebyincorporated by reference in their entirety.

TECHNICAL FIELD

The application belongs to the technical field of packing machines, andparticularly relates to a box sealing device, a packing machine and acomputer-readable medium.

BACKGROUND OF THE PRESENT INVENTION

The market demand of packing boxes is increasing, and the market priceof the packing boxes is much higher than that of ordinary packingproducts. Therefore, large-sized and small-sized food enterprises havemade competitive efforts to expand the development of packing boxesrecently. With respect to the sealing of existing packing boxes,mechanisms for tongue bending and tongue inserting, which are mostlyseparate and independent, require tongue inserting to act alone aftertongue bending, thus being complicated in structure and difficult tocontrol.

SUMMARY OF THE PRESENT INVENTION

The purpose of the present application is to provide a box sealingdevice for sealing a packing box which comprising a main plate and amain cover, comprising a pressing piece, a bending piece connected withthe pressing piece and bent toward the main plate to a preset angle, anda first driving assembly connected with the pressing piece and/or thebending piece to drive the bending piece to move close to the mainplate, the pressing piece is moving in cooperation with the bendingpiece.

In some embodiments, the first driving assembly comprises a firstdriving member and a first connecting piece disposed between the firstdriving member and the pressing piece.

In some embodiments, the pressing piece comprises a pressing piece bodyand two first protrusions arranged on the pressing piece body in aspaced manner.

In some embodiments, the box sealing device further comprises a graspingpiece capable of grasping the main plate, and a second driving assemblycapable of driving the grasping piece to drive the main plate away fromand/or close to the main cover.

In some embodiments, the second driving assembly comprises a secondconnecting piece and a protruding piece protruding from the secondconnecting piece, the grasping piece is disposed on the protrudingpiece.

In some embodiments, the box sealing device further comprises a firstlimiting piece capable of limiting a displacement of the main plate andis disposed at one side of the grasping piece.

In some embodiments, the box sealing device further comprises a thirddriving member connected with the first limiting piece to drive thefirst limiting piece to move.

In some embodiments, the box sealing device further comprises a secondlimiting piece disposed on one side of the grasping piece away from thefirst limiting piece, and a fourth driving member connected with thesecond limiting piece to drive the second limiting piece to move.

In some embodiments, the second limiting piece comprises a secondlimiting piece body and two second protrusions protruding from thesecond limiting piece body, the two second protrusions are arranged in aspaced manner.

In some embodiments, the box sealing device further comprises a pushingpiece disposed on one side of the main cover away from the main plate,and a third driving assembly capable of driving the pushing piece tomove to the main cover.

The present application also provides a packing machine, comprising thebox sealing device aforementioned.

The present application also provides a computer-readable medium, whichcan be connected with the box sealing device aforementioned, havingstored a preset program that, when executed, cause to carry out thefollowing steps: driving, by a first driving assembly, a pressing pieceto move, to allow the pressing piece to press a main cover on a mainplate, and a bending piece to move to one side of the main plate awayfrom the main cover, so as to cooperate with the main plate to bend themain cover to form an insertion tongue.

The present application further provides a computer-readable medium,which can be connected with the box sealing device aforementioned,having stored a preset program that, when executed, cause to carry outthe following steps: driving, by a third driving part, a first limitingpiece to move so as to limit a displacement of a portion of a main plateof a packing box; and driving, by a second driving member, a graspingpiece to grasp the main plate of the packing box and drive the mainplate to move away from the packing box.

Compared with the prior art, the application has the beneficial effectsthat,

a box cover is pressed by a pressing piece, and at this time, when thepressing piece presses a cover plate by a bending piece protruding fromthe pressing piece, the bending piece cooperates with a plate to bendthe cover plate to form an insertion tongue without the cooperation of aplurality of bending plates, so that the structure is simple.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1A is a structure diagram of a packing box according to anembodiment;

FIG. 1A is a structure diagram of a packing box according to anotherembodiment;

FIG. 2 is a schematic structural diagram of a box sealing deviceaccording to a first embodiment of the present application;

FIG. 3 is a schematic structural diagram of a box sealing deviceaccording to a second embodiment of the present application;

FIG. 4 is a partially enlarged view of a portion A of FIG. 3;

FIG. 5 is a schematic structural diagram of a box sealing deviceaccording to a third embodiment of the present application;

FIG. 6 is a partially enlarged view of a portion B of FIG. 5;

FIG. 7 is a partially enlarged view of a portion C of FIG. 5;

FIG. 8 is a schematic structural diagram of a grasping piece, a firstlimiting piece and a second limiting piece according to an embodiment ofthe present application;

FIG. 9 is a schematic structural diagram of a box sealing deviceaccording to a fourth embodiment of the present application;

FIG. 10 is a partially enlarged view of a portion D of FIG. 9;

FIG. 11 is a schematic structural diagram of a box sealing deviceaccording to a fifth embodiment of the present application;

FIG. 12 is a partially enlarged view of a portion E of FIG. 11;

in which: 101 packing box, 1011 side cover, 1012 main cover, 10121 frontcover, 10122 rear cover, 1013 side plate, 1014 main plate, 10141 frontplate, 10142 rear plate, 1015 box opening, 1016 insertion tongue, 10161long insertion tongue, 10162 short insertion tongue, 1017 socket,

1 box sealing device, 11 pressing piece, 111 pressing piece body, 112first protrusion, 113 second groove, 12 bending piece, 13 first drivingassembly, 131 first driving member, 132 first connecting piece, 14grasping piece, 141 second driving assembly, 142 second connectingpiece, 143 protruding piece, 144 second driving member, 15 firstlimiting piece, 151 contact surface, 152 third driving member, 16 secondlimiting piece, 161 fourth driving member, 162 second limiting piecebody, 163 second protrusion, 164 first groove, 17 pushing piece, 171third driving assembly, 18 frame, 19 fifth driving member.

DETAILED DESCRIPTION OF THE PRESENT INVENTION

The following is a detailed description for the technical solutions ofthe present application in combination with specific implementations.However, it should be understood that, without further recitation,elements, structures and features in one implementation may bebeneficially incorporated into other implementations.

In the description of the present application, it is to be understoodthat terms “first”, “second” are merely used for descriptive purpose andshould not be interpreted to indicate or imply the relative importanceor implicitly indicate the number of technical features indicated. Thus,the features defined by “first” and “second” may explicitly orimplicitly include one or more of the features.

In the description of the present application, it is to be noted thatthe direction or positional relationships indicated by terms “upper”,“lower”, “bottom”, “inner” and the like are based on the positionalrelationships in FIG. 3, these terms are merely used to facilitate thedescription of the present application and simplify the description, yetdo not indicate or imply that the devices or elements referred must havea particular orientation, be constructed and operated in particularorientation, and therefore should not be interpreted as a limitation onthis application.

In the description of the present application, it is to be noted that,unless clearly indicates otherwise, terms “connect”, “connection” shallbe generally understood, such as, may be fixed connection, detachableconnection or integrated connection, may be directly connected, orindirectly connected through intermediate media, or inner communicationof two components. For the person skilled in the art, the specificmeanings of the above terms in the present application may beinterpreted according to specific circumstance.

The implementations are only description for the preferred embodimentsof the present application, not a limitation on the scope of the presentapplication, without departing from the design spirit of the presentapplication, all kinds of transformation and modification made by theperson skilled in the art to the technical solution of the presentapplication should fall within the protection scope defined by claims ofthe present application.

FIG. 1A shows a packing box 101, wherein two opposite side covers 1011and two main covers 1012 (namely, a front cover 10121 and a rear cover10122) located between the side covers 1011 are arranged at each end ofthe packing box 101, the side covers 1011 at the two ends of the packingbox are connected with two opposite side plates 1013, and the maincovers 1012 at the two ends of the packing box are connected with twoopposite main plates 1014 (namely, a front plate 10141 and a rear plate10142). The front cover 10121 and the rear cover 10122 may each beprovided to include a portion for covering a box opening 1015 and aportion for being bent into an insertion tongue 1016. Each of the frontcover 10121 includes a portion for covering the box opening 1015 and aportion for being bent into a long insertion tongue 10161; a socket 1017is formed at a turning point between the front cover 10121 and the frontplate 10141; each of the rear cover 10122 includes a portion forcovering the box opening 1015 and a portion for being bent into a shortinsertion tongue 10162; when the packing box is sealed, the front covers10121 need to be bent into the long insertion tongues 10161 and insertedinto the packing box and then the rear covers 10122 are bent into theshort insertion tongues 10162 and inserted into the sockets 1017 of thefront covers.

Another packing box is shown in FIG. 1B, which is different from that inFIG. 1A in that one front cover 10121 is arranged at the end of thepacking box 101. The front cover 10121 includes a portion for covering abox opening 1015 and a portion for being bent into a long insertiontongue 10161. When the packing box is sealed, the front cover 10121needs to be bent into the long insertion tongue 10161 and inserted intothe packing box.

Referring to FIG. 2, the present application provides a box sealingdevice 1, which can be used to seal the packing box 101 shown in FIGS.1A and 1B. The box sealing device 1 comprises a pressing piece 11, abending piece 12 connected with the pressing piece 11 and bent toward amain plate 1014 to a preset angle, and a first driving assembly 13connected with the pressing piece 11 and/or the bending piece 12 todrive the bending piece 12 to move close to the main plate 1014, thepressing piece 11 is moving in cooperation with the bending piece 12.When the pressing piece 11 presses the main cover 1012, the bendingpiece 12 is located on one side of the main plate 1014 away from themain cover 1012, that is, the bending piece 12 is located on a side ofthe main plate 1014 outside the packing box, and thus cooperates withthe main plate 1014 to bend the main cover 1012 toward the main plate1014 to form an insertion tongue. When the pressing piece 11 presses themain cover 1012, the bending piece 12 cooperates with the main plate1014 to bend the main cover 1012 to form the insertion tongue, and thebox sealing device is simple in structure. When the pressing piece 11presses the main cover 1012, the bending piece 12 and the main plate1014 almost fit each other or form a relatively small included angle, soas to cooperate with the main plate 1014 to bend a portion of the maincover 1012 beyond the main plate 1014 to form the insertion tongue.

The bent direction of the bending piece 12 corresponds to that of themain cover 1012. Specifically, the pressing piece 11 presses the maincover 1012 to be bent to cover the box opening 1015, if the pressingpiece 11 is located above the main cover 1012, the main cover 1012 needsto be bent downward to form the insertion tongue 1016, thus the bendingpiece 12 is also bent downward; and if the pressing piece 11 is locatedbelow the main cover 1012, the main cover 1012 needs to be bent upwardto form the insertion tongue 1016, thus the bending piece 12 is alsobent upward. In this embodiment, a description is given by taking thepressing piece 11 located above the main cover 1012 as an example. Whenthe main cover 1012 is pressed on the box opening 1015 by the pressingpiece 11, the bending piece 12 bends the portion of the main cover 1012beyond the main plate 1014 downward at a certain angle, thus form theinsertion tongue. The first driving assembly 13 may be connected withthe pressing piece 11 and the bending piece 12 in various ways, as longas synchronous movement of the bending piece 12 and the pressing piece11 is ensured. FIGS. 1A and 1B show only two types of the packing box101, wherein the main plate 1014 and the main cover 1012 may have othershapes and also include other structures, as long as the packing boxincludes main covers 1012 for closing and main plates 1014 matched withthe main covers 1012. The description of the packing box should not beregarded as limiting the protection scope of the present application.

Specifically, the first driving assembly 13 comprises a first drivingmember 131 and a first connecting piece 132 disposed between the firstdriving member 131 and the pressing piece 11. The first connecting piece132 is connected with the pressing piece 11, and the first drivingmember 131 is preferably a rotary driving member, such as a rotarypneumatic cylinder. The first driving member 131 drives the pressingpiece 11 to move in a certain arc trajectory through the firstconnecting piece 132, which is similar to a motion trajectory when themain cover 1012 is pressed, thus ensuring that the pressing piece 11will not damage or scratch the main cover 1012 in a pressing process andeffectively protecting the packing box 101. The first driving member 131can also select a servo motor or a stepping motor to bend the main cover1012 in stages to form the insertion tongue.

As a preferred embodiment, the pressing piece 11 comprises a pressingpiece body 111 and two first protrusions 112 arranged on the pressingpiece body 111 in a spaced manner. The two first protrusions 112correspond to two sides of the main cover 1012 in position, thus, whenthe pressing piece 11 presses the main cover 1012 to allow the maincover 1012 to cover the box opening 1015, the first protrusions 112 justpress on the two sides of the main cover 1012; the first protrusions 112exert pressure on positions close to the two sides of the main cover1012, the pressure on the main cover 1012 can be transferred to the sideplates 1013 accordingly, and a square box body jointly enclosed by theside plates 1013 and the main plates 1014 can provide support for themain cover 1012, so that the main cover 1012 can be pressed effectivelywithout being crushed. Since the side plates 1013 can serve as a supportfor the main cover 1012 to bear the pressure of the pressing piece 11,the main cover 1012 is prevented from being depressed downward due toexcessive pressure. It should be noted here that the pressing piece 11of the present embodiment is designed for the square packing box 101shown in FIGS. 1A and 1B, and the shape of the pressing piece 11 may beadaptively adjusted if it is used in packing boxes 101 with other shapesor structures.

The box sealing device provided in the present embodiment can be usedfor the bending of the front cover 10121 of the packing box shown inFIG. 1B, and the bending pieces 12 may be a plurality of bending pieces12 uniformly arranged along the pressing piece 11 to ensure that theoverall angle and shape of the long insertion tongue 10161 bent from thefront cover 10121 are relatively consistent. Specifically, a pluralityof bending pieces 12 are uniformly arranged along the pressing piecebody 111. Of course, the box sealing device provided in the presentembodiment is not limited to sealing the above-mentioned types ofpacking boxes, and any packing box with similar front cover may besealed by the box sealing device of this embodiment.

The box sealing device provided in this embodiment may be used for thebending of the rear cover 10122 of the packing box shown in FIG. 1A. Asshown in FIG. 2, the bending piece 12 is arranged on the pressing piecebody 111 between the two first protrusions 112, so that when the bendingpiece 12 bends the rear cover 10122 to form the insertion tongue, thebending piece 12 bends a middle portion of the rear cover 10122 beyondthe main plate 1014 to form a short insertion tongue 10162; and thebending piece 12 disposed between the two first protrusions 112 does notaffect the operation of the pressing piece 11, and can ensure that thebending angle and shape of the insertion tongue are relativelyconsistent. The bending piece of the box sealing device provided in thisembodiment is matched with the short insertion tongue, so that thestructure is simple and the bending is convenient. Of course, the boxsealing device provided in this embodiment is not limited to sealing theabove-mentioned types of packing boxes, and any packing box with similarrear cover may be sealed by the box sealing device of this embodiment.

As a preferred embodiment, as shown in FIGS. 3 and 4, the box sealingdevice 1 further comprises a grasping piece 14 capable of grasping themain plate 1014, and a second driving assembly 141 capable of drivingthe grasping piece 14 to drive the main plate 1014 away from and/orclose to the main cover 1012. The box sealing device 1 provided in thepresent embodiment may also be used to insert the insertion tongue 1016of the main cover into the packing box 101 or into a socket 1017, thepressing piece 11 presses the main cover 1012, and the bending piece 12guides the insertion tongue 1016 into a corresponding position. However,when the size of a gap or the socket 1017 of the packing box 101 isrelatively small, the success rate of inserting the insertion tongue1016 is low. The main plate 1014 is moved away from the main cover 1012by the grasping piece 14, so that the gap for inserting tongue isfurther enlarged, and the success rate of inserting the insertion tongueis increased. In addition, after the bending piece 12 inserts theinsertion tongue 1016 into the gap or the socket 1017 of the packing box101, the grasping piece 14 moves toward the main plate 1014 by a presetdistance and abuts against the main plate 1014, and the bending piece 12then withdraws from the gap or the socket 1017 of the packing box 101,thereby preventing the insertion tongue 1016 from being taken out by thebending piece 12 and increasing the success rate of inserting theinsertion tongue. The grasping piece enables the box sealing device tobe used for the inserting of the insertion tongues 1016 of the packingbox with different sizes and materials.

Specifically, as shown in FIG. 4, the second driving assembly 141comprises a second connecting piece 1411, and a protruding piece 1412protruding from the second connecting piece 1411, the grasping piece 14is disposed on the protruding piece 1412. With the arrangement of theprotruding piece 1412, it may cooperate with the bending piece 12. Thesecond driving assembly 141 further comprises a second driving member1413, which serves as a power source to drive the grasping piece 14 tomove. Specifically, the second driving member 1413 is connected with thesecond connecting piece 1411. A servo motor is selected as the seconddriving member to drive a lead screw, the second connecting piece isconnected with a nut on the lead screw, and a suction disk connectedwith the second connecting piece is then driven to move by the nut onthe lead screw. The second driving member may also be a pneumaticcylinder, which is simple in structure, light in weight, easy to controland low in cost.

More specifically, the grasping piece 14 comprises a pneumatic suctiondisk, which is opposite to the main plate 1014. With the use of thepneumatic suction disk, the grasping piece is not only simple instructure and easy to operate, but also is suitable for the grasping ofthe main plates 1014 with different sizes or shapes, without makingfurther adjustment according to the change of the size or shape of themain plate 1014.

As shown in FIGS. 5 and 6, the box sealing device 1 provided in thepresent embodiment further comprises a first limiting piece 15, which isdisposed at one side of the grasping piece 14 and capable of limiting adisplacement of a portion of the main plate 1014 corresponding to thefirst limiting piece 15, thereby preventing the whole movement of thepacking box 101 or the main plate 1014. The first limiting piece 15 hasa contact surface 151 corresponding to the shape of the main plate 1014,the contact surface 151 is in contact with at least a portion of themain plate 1014 to limit the displacement of the portion of the mainplate 1014, and the limited area of the main plate 1014 may beeffectively controlled by adjusting the contact area between the mainplate 1014 and the contact surface 151. When inserting tongue, thegrasping piece 14 may pull the main plate 1014 of the packing box apartto enlarge the gap for inserting tongue, and at the same time thedisplacement of the portion of the main plate being in contact with thecontact surface is limited by the first limiting piece 15, which mayprevent the whole packing box 101 or large area of the main plate 1014from moving, thus avoiding inaccurate tongue inserting or damage to thepacking box 101. In addition, in a case where the main plate 1014 bulgesoutward or is recessed inward and presents an arc surface due to factorssuch as size or material, when the main cover 1012 is pressed by thepressing piece 11 to be in contact with the main plate 1014, the contactposition therebetween is approximately curved, but the bending piece 12cannot bend the main cover 1012 along the curve to form an insertiontongue. The first limiting piece 15 is capable of pushing the main plate1014 close to or away from the main cover 1012, the contact surface 151of the first limiting piece is forced to be attached to the main plate1014, so that when the pressing piece 11 presses the main cover 1012,the surface of the main plate 1014 is nearly flat; and the contactposition between the main cover 1012 and the main plate 1014 isgenerally straight, so that the bending piece 12 may bend the main cover1012 along a straight line to form the insertion tongue 1016. The firstlimiting piece 15 enables the box sealing device 1 to be used forbending packing boxes 101 with different sizes and materials to form theinsertion tongues.

Specifically, as shown in FIG. 6, the box sealing device 1 furthercomprises a third driving member 152 connected with the first limitingpiece 15 to drive the first limiting piece 15 to move. The third drivingmember 152 is capable of driving the first limiting piece 15 to moveclose to or away from the main plate 1014. Before the insertion tongueis inserted, the third driving member 152 allows the first limitingpiece 15 to be in an original position that not affect the packing box101 entering a corresponding station; and when the insertion tongue isinserted, the third driving member 152 drives the first limiting piece15 to move to be in contact with the main plate 1014, so as to limit thedisplacement of the contact portion of the main plate 1014. With thearrangement of the first limiting piece 15 and the third driving member152, the box sealing device 1 may also be suitable for inserting tongueof the deformed packing box 101, especially for the packing box deformeddue to containing many soft materials such as gloves, and the thirddriving member 152 may drive the first limiting piece 15 to restrict thedisplacement of the portion of the main plate 1014 and press the portionof the main panel 1014 flat at the same time.

When the insertion tongue is inserted into the corresponding position,if the bending degree of the insertion tongue is too low or theinserting position deviates from the corresponding position, the successrate of insertion cannot be guaranteed. Therefore, as shown in FIGS. 5,7 and 8-12, as a preferred embodiment, the box sealing device 1 furthercomprises a second limiting piece 16 disposed on one side of thegrasping piece 14 away from the first limiting piece 15, and a fourthdriving member 161 connected with the second limiting piece 16 to drivethe second limiting piece 16 to move. In this embodiment, the secondlimiting piece 16 is located above the grasping piece 14 for limitingthe insertion tongue 1016 located above the main plate 1014, and thefirst limiting piece 15 is located below the grasping piece 14 forlimiting the main plate 1014 located below the grasping piece 14. Thefourth driving member 161 can drive the second limiting piece 16 to moveclose to or away from the main plate 1014, so that when the insertiontongue 1016 is inserted, driven by the fourth driving member 161 thesecond limiting piece 16 continues to push the insertion tongue 1016 toa preset bending direction, thus ensure that the bending angle and thetongue inserting position of the insertion tongue 1016 are within presetranges, and a movement track of the insertion tongue is defined to guidethe insertion tongue 1016 into the packing box 101, thereby guaranteeingthe successful inserting of the insertion tongue. The fourth drivingmember 161 can be set as required, and here, only a section ofdisplacement is required, so that it is preferably be a pneumaticcylinder, which is simple structure, light in weight, easy to controland low in cost.

Specifically, as shown in FIGS. 7, 10 and 12, the second limiting piece16 comprises a second limiting piece body 162 and two second protrusions163 protruding from the second limiting piece body 162, the two secondprotrusions 163 are arranged in a spaced manner, that is, a first groove164 for accommodating the insertion tongue 1016 is formed between thetwo second protrusions 163. The second limiting piece body 161 is usedto push the insertion tongue to continue to be bent, and the two secondprotrusions 163 are used to limit the insertion tongue in the firstgroove 164. The position of the first groove 164 corresponds to theinserting position of the insertion tongue, that is, the position of thesocket or the position of the box opening, so as to ensure that theinsertion tongue does not deviate from the inserting position. Thesecond limiting piece 16 is close to the main plate 1014, and theinsertion tongue 1016 enters the first groove 164, and continues to bebent under the push of the second limiting piece body 161. With thearrangement of the two second protrusions 163, a force can be applied tothe insertion tongue at multiple points, to prevent a situation thatwhen the force is applied to only one point, only a portion of theinsertion tongue 1016 is bent or moves while other portions do not moveor move reversely, thus ensuring effective bending of the insertiontongue and the success rate of inserting the insertion tongue. As shownin FIGS. 1A and 7, the short insertion tongue 10162 is located in themiddle of the rear cover 10122; in order to limit the short insertiontongue, the second protrusions 163 need be located near a middle of thesecond limiting piece body 162, and then the second protrusions 163 willprevent the pressing piece 11 from pressing the rear cover 10122;accordingly, to prevent the interaction between the second limitingpiece 16 and the pressing piece 11, two second grooves 113 correspondingto the two second protrusions 163 are formed in the pressing piece 11,so that the pressing piece 11 can pass through the second protrusions163 without obstacles during the pressing process, and the mutualinfluence between the second limiting piece 16 and the pressing piece 11as well as mutual interference are effectively prevented. With respectto the packing box of FIG. 1B, the two second protrusions 163 arelocated on the two sides of the front cover 10121, so that the pressingpiece 11 will not be affected to pass through the two second protrusions163.

The main cover 1012 in an un-pressed state has an included angle ofabout 90 degrees with a plane where the box opening 1015 is located. Ifthe pressing piece 11 directly presses the main cover 1012, the maincover 1012 may be bent from the middle position. In order to avoidinaccurate bending position, as shown in FIGS. 3 and 4, as a preferredembodiment, the box sealing device 1 further comprises a pushing piece17 disposed on one side of the main cover 1012 away from the main plate1014, and a third driving assembly 171 capable of driving the pushingpiece 17 to move to the main cover 1012. When pressing and foldingtongue, or when inserting the insertion tongue, the third drivingassembly 171 drives the pushing piece 17 to push the main cover 1012 toget close to the main plate 1014 and the main cover is bentpreliminarily, so that the pressing piece 11 can press the main coverconveniently. The arrangement of the above structure ensures theaccuracy of the bending position of the main cover 1012 in the pressingoperation, and the structure is simple and the operation is easy. Inthis embodiment, the pushing piece 17 is disposed on the side of themain cover 1012 away from the main plate 1014. In this embodiment, aplurality of smooth transition inclined planes are disposed at one endof the pushing piece 17 close to the main cover 1012, the inclinedplanes are in contact with the main cover 1012 under the driving of thethird driving assembly 171, and the friction between the inclined planesand the main cover 1012 is small, so that the main cover 1012 iseffectively prevented from being scratched or stuck when the main cover1012 is pushed. It should be noted that if the main cover 1012 is drivenby a structure such as a suction disk or a clamping jaw, the structurecan also be disposed on one side of the main cover 1012 close to themain plate 1014.

The box sealing device provided in the first embodiment of theapplication is simple in structure and easy to mount, and, when beingused for product packing, can be used in combination with an apparatusused in working processes such as box blank unfolding, packing boxgrabbing and material grabbing, and can also be used in combination withassemblies used in other packing processes of main covers or sidecovers.

When the box sealing device 1 provided in the first embodiment of theapplication is applied as a part of a packing machine to the packing ofmaterials, it is usually and necessarily mounted on the packing machine.Therefore, as shown in FIGS. 3, 9 and 11, the box sealing device 1further comprises: a frame 18 on which the box sealing device 1 ismounted, and a fifth driving member 19 mounted on the frame 18 to drivethe box sealing device 1 to move along the frame.

A second embodiment of the application provides a packing machine,comprising the box sealing device 1 described above.

A third embodiment of the application also provides a computer-readablemedium, which can be connected with the box sealing device 1 asdescribed in the embodiments above, having stored a preset program that,when executed, cause to carry out the following steps: driving, by afirst driving assembly 13, a pressing piece 11 to move, to allow thepressing piece 11 to press a main cover 1012 on a main plate 1014, and abending piece 12 to move synchronously to one side of the main plate1014 away from the main cover 1012, so as to cooperate with the mainplate 1014 to bend the main cover 1012 to form an insertion tongue.

According to the computer-readable medium described in the presentapplication, the preset program when executed, further cause to carryout the following steps: driving, by a third driving assembly 171, apushing piece 17 to move to bend a main cover 1012 to a preset position,so as to preliminarily bend the main cover 1012; driving, by a firstdriving assembly 13, a pressing piece 11 and/or a bending piece 12 tomove, to allow the pressing piece 11 to press the main cover 1012 andthe bending piece 12 to move to one side of a main plate 1014 away fromthe main cover 1012, so as to cooperate with the main plate 1014 to bendthe main cover 1012 into an insertion tongue; driving, by the firstdriving assembly 13, the pressing piece 11 and/or the bending piece 12to move away from the main plate 1014 to a first preset distance, atthis moment, the main cover 1012 moves away from the main plate 1014under its own elasticity, wherein the first preset distance may be setaccording to a rebound distance of the main cover 1012; driving, by asecond driving assembly 141, a grasping piece 14 to grasp the main plate1014 and to move away from the main cover 1012 to a second presetdistance, so as to enlarge a gap for inserting the insertion tongue,thus ensure the inserting of the insertion tongue, wherein the secondpreset distance is set as required to avoid damage to the packing box101 caused by excessive movement as much as possible; driving, by thefirst driving assembly 13, the pressing piece 11 and/or the bendingpiece 12 to move close to the main plate 1014 to insert the insertiontongue; driving, by the first driving assembly 13, the pressing piece 11and/or the bending piece 12 to return; driving, by the second drivingassembly 141, the grasping piece 14 to return, and driving, by the thirddriving assembly 171, the pushing piece 17 to return, thereby completingall of the operations comprising tongue bending and tongue insertion,and thus being simple and reliable.

According to the box sealing device 1 of the present application, whenin use, the first driving member 131 drives the pressing piece 11 torotate, and the pressing piece 11 and the bending piece 12 cooperatewith the main plate 1014 of the packing box to complete the bending ofthe insertion tongue; then, the first driving member 131 drives thepressing piece 11 to move reversely, to allow the pressing piece 11 andthe bending piece 12 to move to preset positions; the fourth drivingmember 161 drives the second limiting piece 16 to push the insertiontongue to make the bending degree and position of the insertion tonguemeet requirements; the third driving member 152 drives the firstlimiting piece 15 to move close to the main plate 1014 of the packingbox with a portion of the main plate 1014 of the packing box beinglimited; the second driving member 1413 drives the grasping piece 14 tograsp the main plate 1014 of the packing box and drive the main plate1014 of the packing box to move away from the packing box, so that thegap for inserting the insertion tongue is enlarged; and the firstdriving member 131 drives the pressing piece 11 to rotate to allow thepressing piece 11 and the bending piece 12 to insert the insertiontongue into the gap, thereby completing tongue bending and tongueinsertion, followed by a step that various components return to theiroriginal positions.

The application also provides a computer-readable medium, which can beconnected with the box sealing device as described in the embodimentsabove, having stored a preset program that, when executed, cause tocarry out the following steps: driving, by a third driving part 152, afirst limiting piece 15 to move so as to limit a displacement of aportion of a main plate 1014 of a packing box; and driving, by a seconddriving member 1413, a grasping piece 14 to grasp the main plate 1014 ofthe packing box and drive the main plate 1014 to move away from thepacking box. With the arrangement of the grasping piece 14 and thesecond driving member 1413, when inserting the insertion tongue, themain plate of the packing box can be pulled to open to enlarge the gapfor inserting the insertion tongue, and at the same time by limiting thedisplacement of the portion of the main plate 1014 of the packing box onone side of the grasping piece 14 by the first limiting piece 15, thewhole packing box or large area of the main plate 1014 of the packingbox can be prevented from moving, thereby avoiding inaccurate tongueinsertion or damage to the packing box.

The preset program, when executed, cause to carry out the followingsteps: driving, by a third driving member 152, a first limiting piece 15to move close to a main plate of a packing box and press the main plateof the packing box; driving, by a first driving member 131, a pressingpiece 11 to rotate, and a bending piece 12 to cooperate with the mainplate of the packing box to complete insertion tongue bending; driving,by the first driving member 131, the pressing piece 11 to rotatereversely to a first preset position, and driving, by a fourth drivingmember, a second limiting part 16 to move close to the main plate of thepacking box, so as to push the insertion tongue to further be bent tomake a bending degree and position of the insertion tongue reach apreset range; driving, by a second driving member 1413, a grasping piece14 to grasp the main plate of the packing box and move away from thepacking box; driving, by the first driving member 131, the pressingpiece 11 to rotate, and the bending piece 12 to insert the insertiontongue into the packing box; driving, by the second driving member 1413,the grasping piece 14 to move close to the packing box to press the mainplate of the packing box and prevent the insertion tongue from movingtogether with the pressing piece 11; driving, by the first drivingmember 131, the pressing piece 11 to return, driving, by the fourthdriving member, the second limiting piece 16 to return, and driving, bythe second driving member 1413, the grasping piece 14 to return.

A fourth embodiment of the application provides a method for bending aninsertion tongue and inserting the insertion tongue, which comprises thefollowing steps: driving, by a first driving assembly 13, a pressingpiece 11 to move, to allow the pressing piece 11 to press a main cover1012 on a main plate 1014, and a bending piece 12 to move synchronouslyto one side of the main plate 1014 away from the main cover 1012, so asto cooperate with the main plate 1014 to bend the main cover 1012 toform an insertion tongue.

Preferably, the method for bending the insertion tongue and insertingthe insertion tongue comprises the following steps: driving, by a thirddriving assembly 171, a pushing piece 17 to move to bend a main cover1012 to a preset position, so as to preliminarily bend the main cover1012; driving, by a first driving assembly 13, a pressing piece 11and/or a bending piece 12 to move, to allow the pressing piece 11 topress the main cover 1012 and the bending piece 12 to move to one sideof a main plate 1014 away from the main cover 1012, so as to cooperatewith the main plate 1014 to bend the main cover 1012 into an insertiontongue; driving, by the first driving assembly 13, the pressing piece 11and/or the bending piece 12 to move away from the main plate 1014 to afirst preset distance, at this moment, the main cover 1012 moves awayfrom the main plate 1014 under its own elasticity, wherein the firstpreset distance may be set according to a rebound distance of the maincover 1012; driving, by a second driving assembly 141, a grasping piece14 to grasp the main plate 1014 and to move away from the main cover1012 to a second preset distance, so as to enlarge a gap for insertingthe insertion tongue and ensure the inserting of the insertion tongue,wherein the second preset distance is set as required to avoid damage tothe packing box 101 caused by excessive movement as much as possible;driving, by the first driving assembly 13, the pressing piece 11 and/orthe bending piece 12 to move close to the main plate 1014 to insert theinsertion tongue; driving, by the first driving assembly 13, thepressing piece 11 and/or the bending piece 12 to return; driving, by thesecond driving assembly 141, the grasping piece 14 to return, anddriving, by the third driving assembly 171, the pushing piece 17 toreturn.

Preferably, the method for bending the insertion tongue and insertingthe insertion tongue comprises the following steps: driving, by a thirddriving part 152, a first limiting piece 15 to move so as to limit adisplacement of a portion of a main plate 1014 of a packing box; anddriving, by a second driving member 1413, a grasping piece 14 to graspthe main plate 1014 of the packing box and drive the main plate 1014 tomove away from the packing box. With the arrangement of the graspingpiece 14 and the second driving member 1413, when inserting insertiontongue, the main plate of packing box can be pulled to open to enlarge agap for inserting the insertion tongue, and at the same time by limitingthe displacement of the portion of the main plate 1014 of the packingbox on one side of the grasping piece 14 by the first limiting piece 15,the whole packing box or large area of the main plate 1014 of thepacking box can be prevented from moving, thereby avoiding inaccuratetongue inserting or damage to the packing box.

Preferably, the method for bending the insertion tongue and insertingthe insertion tongue comprises the following steps: driving, by a thirddriving member 152, a first limiting piece 15 to move close to a mainplate of a packing box and press the main plate of the packing box;driving, by a first driving member 131, a pressing piece 11 to rotate,and a bending piece 12 to cooperate with the main plate of the packingbox to complete insertion tongue bending; driving, by the first drivingmember 131, the pressing piece 11 to rotate reversely to a first presetposition, and driving, by a fourth driving member, a second limitingpart 16 to move close to the main plate of the packing box, so as topush the insertion tongue to further be bent to make a bending degreeand position of the insertion tongue reach a preset range; driving, by asecond driving member 1413, a grasping piece 14 to grasp the main plateof the packing box and move away from the packing box; driving, by thefirst driving member 131, the pressing piece 11 to rotate, and thebending piece 12 to insert the insertion tongue into the packing box;driving, by the second driving member 1413, the grasping piece 14 tomove close to the packing box to press the main plate of the packing boxand prevent the insertion tongue from moving together with the pressingpiece 11; driving, by the first driving member 131, the pressing piece11 to return, driving, by the fourth driving member, the second limitingpiece 16 to return, and driving, by the second driving member 1413, thegrasping piece 14 to return.

1. A box sealing device for sealing a packing box which comprising amain plate and a main cover, comprising a pressing piece, a bendingpiece connected with the pressing piece and bent toward the main plateto a preset angle, and a first driving assembly connected with thepressing piece and/or the bending piece to drive the bending piece tomove close to the main plate, the pressing piece is moving incooperation with the bending piece; further comprising a grasping piececapable of grasping the main plate, and a second driving assemblycapable of driving the grasping piece to drive the main plate away fromand/or close to the main cover; a first limiting piece capable oflimiting a displacement of the main plate and is disposed at one side ofthe grasping piece; and a third driving member connected with the firstlimiting piece to drive the first limiting piece to move.
 2. The boxsealing device of claim 1, further comprising a second limiting piecedisposed on one side of the grasping piece away from the first limitingpiece, and a fourth driving member connected with the second limitingpiece to drive the second limiting piece to move.
 3. The box sealingdevice of claim 2, wherein the second limiting piece comprises a secondlimiting piece body and two second protrusions protruding from thesecond limiting piece body, the two second protrusions are arranged in aspaced manner.
 4. The box sealing device of claim 1, wherein the firstdriving assembly comprises a first driving member and a first connectingpiece disposed between the first driving member and the pressing piece.5. The box sealing device of claim 1, wherein the pressing piececomprises a pressing piece body and two first protrusions arranged onthe pressing piece body in a spaced manner.
 6. The box sealing device ofclaim 1, wherein the second driving assembly comprises a secondconnecting piece and a protruding piece protruding from the secondconnecting piece, the grasping piece is disposed on the protrudingpiece.
 7. The box sealing device of claim 1, further comprising apushing piece disposed on one side of the main cover away from the mainplate, and a third driving assembly capable of driving the pushing pieceto move to the main cover.
 8. A packing machine, comprising the boxsealing device of claim
 1. 9. A packing machine, comprising the boxsealing device of claim
 2. 10. A packing machine, comprising the boxsealing device of claim
 3. 11. A packing machine, comprising the boxsealing device of claim
 4. 12. A packing machine, comprising the boxsealing device of claim
 5. 13. A packing machine, comprising the boxsealing device of claim
 6. 14. A packing machine, comprising the boxsealing device of claim
 7. 15. A non-transient computer-readable medium,which can be connected with the box sealing device of claim 1, havingstored a preset program that, when executed, cause to carry out thefollowing steps: driving, by a first driving assembly, a pressing pieceto move, to allow the pressing piece to press a main cover on a mainplate, and a bending piece to move to one side of the main plate awayfrom the main cover, so as to cooperate with the main plate to bend themain cover to form an insertion tongue.
 16. A computer-readable medium,which can be connected with the box sealing device of claim 1, havingstored a preset program that, when executed, cause to carry out thefollowing steps: driving, by a third driving part, a first limitingpiece to move so as to limit a displacement of a portion of a main plateof a packing box; and driving, by a second driving member, a graspingpiece to grasp the main plate of the packing box and drive the mainplate to move away from the packing box.